BATON ROUGE - Police are hoping tipsters can help crack the case of a missing teacher whose boyfriend is not cooperating with the investigation into her disappearance.

Lyntell Washington was declared missing when her 3-year-old child was found wandering around a parking lot in Baton Rouge Thursday morning. When a good Samaritan found the child and took her in, the child pointed toward a car where there was a pool of blood. Police arrested Washington's boyfriend, Robert Marks, Friday morning on charges related to the child being left in the parking lot earlier in the week. Detectives believe Marks had the child in his care Wednesday then left her in the lot at 11832 Newcastle Avenue where she was found the next morning.

Saturday, a police spokesperson said detectives hope people will recognize Washington, the child – identified as Darrille – or Marks. A Friday search of the Atchafalaya Basin was called off just before sunset Friday. But, police said they are looking in areas north of Baton Rouge – Baker and St. Francisville – where Marks' cell phone signal was found to be moving about between Wednesday and his arrest Friday. Police are using tracking technology to trace his whereabouts through his cell phone's location.

Detectives have talked with Marks, police said, but he most recently claimed to know nothing about where Washington might be and asked for his attorney.

Both Washington and Marks work atBrookstown Middle School in Baton Rouge. Washington is an instructional specialist; Marks is the assistant principal. A school system spokesperson said Marks is on leave due to his arrest.

Friday night on the 10:00 news, friends and family of Washington said they fear the worst since it is not Washington's nature to disappear.